How are the Caribbean islands not American?
Madagascar is Africa, Japan is Asia. I don't know what to categorize Iceland as, though.
> New Zealand is part of Australia. (Continentally-
> speaking!! Don't flame me, Kiwis)
I'm not a kiwi, but NZ is on a subduction zone so can't be part of an existing continent. PNG is probably more what you were thinking of re: AU.The plate boundary of American and Eurasian continents -- Mid Atlantic Ridge -- runs through Iceland.
Wikipedia: https://en.wikipedia.org/wiki/Mid-Atlantic_Ridge
A tourism advertisement: http://www.visitreykjanes.is/en/moya/toy/index/place/bridge-...
(Haven't been there but I've been thinking that one day I should.)